2011-06-25 11:06:24 +00:00
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/*
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* Copyright (c) 2011 Stefano Sabatini
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* Copyright (c) 2010 Baptiste Coudurier
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* Copyright (c) 2003 Michael Zucchi <notzed@ximian.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/**
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* @file
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* temporal field interlace filter, ported from MPlayer/libmpcodecs
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*/
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#include "libavutil/imgutils.h"
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2012-07-08 01:46:59 +00:00
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#include "libavutil/avassert.h"
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2011-06-25 11:06:24 +00:00
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#include "avfilter.h"
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#include "internal.h"
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2012-04-29 14:45:35 +00:00
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enum TInterlaceMode {
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MODE_MERGE = 0,
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MODE_DROP_EVEN,
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MODE_DROP_ODD,
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MODE_PAD,
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MODE_INTERLEAVE_TOP,
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MODE_INTERLEAVE_BOTTOM,
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MODE_INTERLACEX2,
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};
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static const char *tinterlace_mode_str[] = {
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"merge",
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"drop_even",
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"drop_odd",
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"pad",
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"interleave_top",
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"interleave_bottom",
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"interlacex2",
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NULL
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};
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2011-06-25 11:06:24 +00:00
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typedef struct {
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2012-04-29 14:45:35 +00:00
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enum TInterlaceMode mode; ///< interlace mode selected
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2011-06-25 11:06:24 +00:00
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int frame; ///< number of the output frame
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int vsub; ///< chroma vertical subsampling
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AVFilterBufferRef *cur;
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AVFilterBufferRef *next;
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uint8_t *black_data[4]; ///< buffer used to fill padded lines
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int black_linesize[4];
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} TInterlaceContext;
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#define FULL_SCALE_YUVJ_FORMATS \
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PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUVJ440P
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static enum PixelFormat full_scale_yuvj_pix_fmts[] = {
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FULL_SCALE_YUVJ_FORMATS, PIX_FMT_NONE
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};
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum PixelFormat pix_fmts[] = {
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PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P,
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PIX_FMT_YUV444P, PIX_FMT_YUV410P, PIX_FMT_YUVA420P,
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PIX_FMT_GRAY8, FULL_SCALE_YUVJ_FORMATS,
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PIX_FMT_NONE
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};
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2012-06-16 09:47:46 +00:00
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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2011-06-25 11:06:24 +00:00
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return 0;
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}
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2012-07-05 22:45:36 +00:00
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static av_cold int init(AVFilterContext *ctx, const char *args)
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2011-06-25 11:06:24 +00:00
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{
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TInterlaceContext *tinterlace = ctx->priv;
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2012-04-29 14:45:35 +00:00
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int i;
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char c;
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2011-06-25 11:06:24 +00:00
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2012-04-29 14:45:35 +00:00
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tinterlace->mode = MODE_MERGE;
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2011-06-25 11:06:24 +00:00
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2012-04-29 14:45:35 +00:00
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if (args) {
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if (sscanf(args, "%d%c", (int *)&tinterlace->mode, &c) == 1) {
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if (tinterlace->mode > 6) {
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av_log(ctx, AV_LOG_ERROR,
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"Invalid mode '%s', use an integer between 0 and 6\n", args);
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return AVERROR(EINVAL);
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}
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av_log(ctx, AV_LOG_WARNING,
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"Using numeric constant is deprecated, use symbolic values\n");
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} else {
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for (i = 0; tinterlace_mode_str[i]; i++) {
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if (!strcmp(tinterlace_mode_str[i], args)) {
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tinterlace->mode = i;
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break;
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}
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}
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if (!tinterlace_mode_str[i]) {
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av_log(ctx, AV_LOG_ERROR, "Invalid argument '%s'\n", args);
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return AVERROR(EINVAL);
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}
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2011-06-25 11:06:24 +00:00
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}
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}
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return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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TInterlaceContext *tinterlace = ctx->priv;
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2012-04-27 20:16:06 +00:00
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if (tinterlace->cur ) avfilter_unref_bufferp(&tinterlace->cur );
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if (tinterlace->next) avfilter_unref_bufferp(&tinterlace->next);
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2011-06-25 11:06:24 +00:00
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av_freep(&tinterlace->black_data[0]);
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}
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static int config_out_props(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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AVFilterLink *inlink = outlink->src->inputs[0];
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const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[outlink->format];
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TInterlaceContext *tinterlace = ctx->priv;
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tinterlace->vsub = desc->log2_chroma_h;
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outlink->w = inlink->w;
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2012-04-29 14:45:35 +00:00
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outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD ?
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2011-06-25 11:06:24 +00:00
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inlink->h*2 : inlink->h;
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2012-04-29 14:45:35 +00:00
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if (tinterlace->mode == MODE_PAD) {
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2011-06-25 11:06:24 +00:00
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uint8_t black[4] = { 16, 128, 128, 16 };
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int i, ret;
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if (ff_fmt_is_in(outlink->format, full_scale_yuvj_pix_fmts))
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black[0] = black[3] = 0;
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ret = av_image_alloc(tinterlace->black_data, tinterlace->black_linesize,
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outlink->w, outlink->h, outlink->format, 1);
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if (ret < 0)
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return ret;
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/* fill black picture with black */
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for (i = 0; i < 4 && tinterlace->black_data[i]; i++) {
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int h = i == 1 || i == 2 ? outlink->h >> desc->log2_chroma_h : outlink->h;
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memset(tinterlace->black_data[i], black[i],
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tinterlace->black_linesize[i] * h);
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}
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}
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2012-04-29 14:45:35 +00:00
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av_log(ctx, AV_LOG_INFO, "mode:%s h:%d -> h:%d\n",
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tinterlace_mode_str[tinterlace->mode], inlink->h, outlink->h);
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2011-06-25 11:06:24 +00:00
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return 0;
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}
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#define FIELD_UPPER 0
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#define FIELD_LOWER 1
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#define FIELD_UPPER_AND_LOWER 2
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/**
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* Copy picture field from src to dst.
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*
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* @param src_field copy from upper, lower field or both
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2012-04-27 20:11:15 +00:00
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* @param interleave leave a padding line between each copied line
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2011-06-25 11:06:24 +00:00
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* @param dst_field copy to upper or lower field,
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* only meaningful when interleave is selected
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*/
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static inline
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void copy_picture_field(uint8_t *dst[4], int dst_linesize[4],
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uint8_t *src[4], int src_linesize[4],
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enum PixelFormat format, int w, int src_h,
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int src_field, int interleave, int dst_field)
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{
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const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[format];
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int plane, vsub = desc->log2_chroma_h;
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int k = src_field == FIELD_UPPER_AND_LOWER ? 1 : 2;
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for (plane = 0; plane < desc->nb_components; plane++) {
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int lines = plane == 1 || plane == 2 ? src_h >> vsub : src_h;
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int linesize = av_image_get_linesize(format, w, plane);
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uint8_t *dstp = dst[plane];
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uint8_t *srcp = src[plane];
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lines /= k;
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if (src_field == FIELD_LOWER)
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srcp += src_linesize[plane];
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if (interleave && dst_field == FIELD_LOWER)
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dstp += dst_linesize[plane];
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av_image_copy_plane(dstp, dst_linesize[plane] * (interleave ? 2 : 1),
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srcp, src_linesize[plane]*k, linesize, lines);
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}
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}
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static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
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{
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AVFilterContext *ctx = inlink->dst;
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TInterlaceContext *tinterlace = ctx->priv;
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2012-04-27 20:21:22 +00:00
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avfilter_unref_buffer(tinterlace->cur);
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2011-06-25 11:06:24 +00:00
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tinterlace->cur = tinterlace->next;
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tinterlace->next = picref;
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}
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static void end_frame(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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TInterlaceContext *tinterlace = ctx->priv;
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AVFilterBufferRef *cur = tinterlace->cur;
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AVFilterBufferRef *next = tinterlace->next;
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AVFilterBufferRef *out = NULL;
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2011-12-31 13:12:01 +00:00
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int field, tff;
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2011-06-25 11:06:24 +00:00
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/* we need at least two frames */
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if (!tinterlace->cur)
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return;
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switch (tinterlace->mode) {
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2012-04-29 14:45:35 +00:00
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case MODE_MERGE: /* move the odd frame into the upper field of the new image, even into
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2011-06-25 11:06:24 +00:00
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* the lower field, generating a double-height video at half framerate */
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2012-06-16 09:47:46 +00:00
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out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
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2011-06-25 11:06:24 +00:00
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avfilter_copy_buffer_ref_props(out, cur);
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out->video->h = outlink->h;
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out->video->interlaced = 1;
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out->video->top_field_first = 1;
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/* write odd frame lines into the upper field of the new frame */
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copy_picture_field(out->data, out->linesize,
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cur->data, cur->linesize,
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inlink->format, inlink->w, inlink->h,
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FIELD_UPPER_AND_LOWER, 1, FIELD_UPPER);
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/* write even frame lines into the lower field of the new frame */
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copy_picture_field(out->data, out->linesize,
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next->data, next->linesize,
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inlink->format, inlink->w, inlink->h,
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FIELD_UPPER_AND_LOWER, 1, FIELD_LOWER);
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2012-04-27 20:16:06 +00:00
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avfilter_unref_bufferp(&tinterlace->next);
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2011-06-25 11:06:24 +00:00
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break;
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2012-04-29 14:45:35 +00:00
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case MODE_DROP_ODD: /* only output even frames, odd frames are dropped; height unchanged, half framerate */
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case MODE_DROP_EVEN: /* only output odd frames, even frames are dropped; height unchanged, half framerate */
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out = avfilter_ref_buffer(tinterlace->mode == MODE_DROP_EVEN ? cur : next, AV_PERM_READ);
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2012-04-27 20:16:06 +00:00
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avfilter_unref_bufferp(&tinterlace->next);
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2011-06-25 11:06:24 +00:00
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break;
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2012-04-29 14:45:35 +00:00
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case MODE_PAD: /* expand each frame to double height, but pad alternate
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* lines with black; framerate unchanged */
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2012-06-16 09:47:46 +00:00
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out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
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2011-06-25 11:06:24 +00:00
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avfilter_copy_buffer_ref_props(out, cur);
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out->video->h = outlink->h;
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field = (1 + tinterlace->frame) & 1 ? FIELD_UPPER : FIELD_LOWER;
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/* copy upper and lower fields */
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copy_picture_field(out->data, out->linesize,
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cur->data, cur->linesize,
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inlink->format, inlink->w, inlink->h,
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FIELD_UPPER_AND_LOWER, 1, field);
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/* pad with black the other field */
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copy_picture_field(out->data, out->linesize,
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tinterlace->black_data, tinterlace->black_linesize,
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inlink->format, inlink->w, inlink->h,
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FIELD_UPPER_AND_LOWER, 1, !field);
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break;
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2011-12-31 13:12:01 +00:00
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/* interleave upper/lower lines from odd frames with lower/upper lines from even frames,
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* halving the frame rate and preserving image height */
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2012-04-29 14:45:35 +00:00
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case MODE_INTERLEAVE_TOP: /* top field first */
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case MODE_INTERLEAVE_BOTTOM: /* bottom field first */
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tff = tinterlace->mode == MODE_INTERLEAVE_TOP;
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2012-06-16 09:47:46 +00:00
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out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
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2011-06-25 11:06:24 +00:00
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avfilter_copy_buffer_ref_props(out, cur);
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out->video->interlaced = 1;
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2011-12-31 13:12:01 +00:00
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out->video->top_field_first = tff;
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2011-06-25 11:06:24 +00:00
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2011-12-31 13:12:01 +00:00
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/* copy upper/lower field from cur */
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2011-06-25 11:06:24 +00:00
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copy_picture_field(out->data, out->linesize,
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cur->data, cur->linesize,
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inlink->format, inlink->w, inlink->h,
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2011-12-31 13:12:01 +00:00
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tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER);
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/* copy lower/upper field from next */
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2011-06-25 11:06:24 +00:00
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copy_picture_field(out->data, out->linesize,
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next->data, next->linesize,
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inlink->format, inlink->w, inlink->h,
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2011-12-31 13:12:01 +00:00
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tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER);
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2012-04-27 20:16:06 +00:00
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avfilter_unref_bufferp(&tinterlace->next);
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2011-06-25 11:06:24 +00:00
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break;
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2012-04-29 14:45:35 +00:00
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case MODE_INTERLACEX2: /* re-interlace preserving image height, double frame rate */
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2012-04-29 13:25:57 +00:00
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/* output current frame first */
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out = avfilter_ref_buffer(cur, AV_PERM_READ);
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2012-04-30 20:17:15 +00:00
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out->video->interlaced = 1;
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2012-04-29 13:25:57 +00:00
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2012-06-16 09:47:46 +00:00
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ff_start_frame(outlink, out);
|
|
|
|
ff_draw_slice(outlink, 0, outlink->h, 1);
|
|
|
|
ff_end_frame(outlink);
|
2012-04-29 13:25:57 +00:00
|
|
|
|
|
|
|
/* output mix of current and next frame */
|
|
|
|
tff = next->video->top_field_first;
|
2012-06-16 09:47:46 +00:00
|
|
|
out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
|
2012-04-29 13:25:57 +00:00
|
|
|
avfilter_copy_buffer_ref_props(out, next);
|
|
|
|
out->video->interlaced = 1;
|
|
|
|
|
|
|
|
/* write current frame second field lines into the second field of the new frame */
|
|
|
|
copy_picture_field(out->data, out->linesize,
|
|
|
|
cur->data, cur->linesize,
|
|
|
|
inlink->format, inlink->w, inlink->h,
|
|
|
|
tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER);
|
|
|
|
/* write next frame first field lines into the first field of the new frame */
|
|
|
|
copy_picture_field(out->data, out->linesize,
|
|
|
|
next->data, next->linesize,
|
|
|
|
inlink->format, inlink->w, inlink->h,
|
|
|
|
tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER);
|
|
|
|
break;
|
2011-06-25 11:06:24 +00:00
|
|
|
}
|
|
|
|
|
2012-06-16 09:47:46 +00:00
|
|
|
ff_start_frame(outlink, out);
|
|
|
|
ff_draw_slice(outlink, 0, outlink->h, 1);
|
|
|
|
ff_end_frame(outlink);
|
2011-06-25 11:06:24 +00:00
|
|
|
|
|
|
|
tinterlace->frame++;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int poll_frame(AVFilterLink *outlink)
|
|
|
|
{
|
|
|
|
TInterlaceContext *tinterlace = outlink->src->priv;
|
|
|
|
AVFilterLink *inlink = outlink->src->inputs[0];
|
|
|
|
int ret, val;
|
|
|
|
|
2012-06-16 09:47:46 +00:00
|
|
|
val = ff_poll_frame(inlink);
|
2011-06-25 11:06:24 +00:00
|
|
|
|
|
|
|
if (val == 1 && !tinterlace->next) {
|
2012-06-24 00:09:53 +00:00
|
|
|
if ((ret = ff_request_frame(inlink)) < 0)
|
2011-06-25 11:06:24 +00:00
|
|
|
return ret;
|
2012-06-16 09:47:46 +00:00
|
|
|
val = ff_poll_frame(inlink);
|
2011-06-25 11:06:24 +00:00
|
|
|
}
|
2012-07-08 01:46:59 +00:00
|
|
|
av_assert0(tinterlace->next);
|
2011-06-25 11:06:24 +00:00
|
|
|
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int request_frame(AVFilterLink *outlink)
|
|
|
|
{
|
|
|
|
TInterlaceContext *tinterlace = outlink->src->priv;
|
|
|
|
AVFilterLink *inlink = outlink->src->inputs[0];
|
|
|
|
|
|
|
|
do {
|
|
|
|
int ret;
|
|
|
|
|
2012-06-24 00:09:53 +00:00
|
|
|
if ((ret = ff_request_frame(inlink)) < 0)
|
2011-06-25 11:06:24 +00:00
|
|
|
return ret;
|
|
|
|
} while (!tinterlace->cur);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { }
|
|
|
|
|
|
|
|
AVFilter avfilter_vf_tinterlace = {
|
|
|
|
.name = "tinterlace",
|
|
|
|
.description = NULL_IF_CONFIG_SMALL("Perform temporal field interlacing."),
|
|
|
|
.priv_size = sizeof(TInterlaceContext),
|
|
|
|
.init = init,
|
|
|
|
.uninit = uninit,
|
|
|
|
.query_formats = query_formats,
|
|
|
|
|
|
|
|
.inputs = (const AVFilterPad[]) {
|
|
|
|
{ .name = "default",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
|
|
.start_frame = start_frame,
|
|
|
|
.draw_slice = null_draw_slice,
|
|
|
|
.end_frame = end_frame, },
|
|
|
|
{ .name = NULL}
|
|
|
|
},
|
|
|
|
.outputs = (const AVFilterPad[]) {
|
|
|
|
{ .name = "default",
|
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
|
|
.config_props = config_out_props,
|
|
|
|
.poll_frame = poll_frame,
|
|
|
|
.request_frame = request_frame },
|
|
|
|
{ .name = NULL}
|
|
|
|
},
|
|
|
|
};
|